function defaultimport { default } from "https://deno.land/x/date_fns@v2.22.1/lastDayOfDecade/index.ts"; default(dirtyDate: Date | number): DateExamples// The last day of a decade for 21 December 2012 21:12:00: var result = lastDayOfDecade(new Date(2012, 11, 21, 21, 12, 00)) //=> Wed Dec 31 2019 00:00:00 ParametersdirtyDate: Date | number the original date ReturnsDatethe last day of a decade